Find the unknown length in the right triangle. Find the third side of the triangle. Give an exact answer.
A. 10 ft
B. 2
ft
C. 20
ft
D. 8
ft
Answer: B
Mathematics
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Simplify the expression.23
A. -6 B. -8 C. 8 D. 1
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Find the solution.(x - 7) ÷ 5 = 9
A. 315 B. 80 C. 52 D. 38
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Use the fact that the trigonometric functions are periodic to find the exact value of the expression. Do not use a calculator.sin 
A. 
B. -1
C. - 
D. - 
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Find the missing complex number.(6 - 9i)(?) = 7 + 2i
A. 
+ 
i
B. - 
+ 
i
C. 
+ 
i
D. - 
+ 
i
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